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Full text of "The Cambridge Natural History"

i68

OSTEOLOGY   OF   ANTEATERS

posterior nares backwards. This is also, of course, a character
of various lower vertebrates Another Whale-like character in
the skull is the weak character of the mandible,, which does
not give off a marked coronoid process. But then in neither
group is there much mastication. The tympanic, periotic and
squamosal are ankylosed together. A peculiarity of the cervical

FIG. 94.—Side view of three
xnesosternal segments of a
young Anteater (Taman-
dua), showing the mode of
articulation of the sternal
rib (sr). mst^ The upper
or Inner surface of the
mesoster&al segment ; sy,
the synovial articulation
FIG. 93.-SM1 of Anteater (Myrme-                           ^Z^w®', ^W±*
cQphaga,-).   Veiftral view.   Letters          '                       (From Mower s Osteology,
as in Fig. 92.    In addition, hoc,                                 after ^rker.)
basioccipital; glen, glenoid sur-
face for mandible j pter, ptery-
goid. (From Parker and Has-
•well's Zoology.}
vertebrae is that (as in the Camels) the vertebrarterial canal of
several of the vertebrae perforates the pedicle obliquely. There
are fifteen or sixteen dorsal and three or two lumbar vertebrae.
The additional zygapophyses upon the former have been already
referred to. The mode of articulation of the ribs is highly
singular.
Each segment of the sternum, (of which there are eight) is
separated from the next by a synovial membrane : and it has on
ejtner side two facets for articulation with the ribs. • The way in